[0001] The present invention relates generally to an antenna for a portable radio device,
such as a Bluetooth-capable or IEEE 802.11 b/g -capable device that operates at the
IMS (Industry, Medical and Scientific) frequency band. More particularly, the present
invention relates to a dual-polarized antenna, and an associated methodology, of compact
construction, capable of positioning at, or within, a radio housing of the portable
radio device.
[0002] An array of comer-positioned patches is disposed upon the substrate. The comer-positioned
patches together with connector strips that interconnect adjacent patches are symmetrical
in both a first and a second polarization direction and are of dimensions permitting
symmetrical excitation at a resonant frequency.
Background of the Invention
[0003] Radio communication systems are used by many in modem society to communicate. Many
varied communication services, both voice communication services and data communication
services, are regularly effectuated by way of radio communication systems. And, as
technological advancements permit, the types of communication services effectuable
by way of radio communication systems shall likely increase.
[0004] Cellular communication systems are exemplary of radio communication systems that
have high levels of usage. Cellular communication systems are typically constructed
to provide wide-area coverage. And, their infrastructures have been installed over
significant portions of the populated areas of the world. A user communicates by way
of a radio communication system through use of a wireless device, a radio transceiver,
sometimes referred to as a mobile station or user equipment (UE). Typically, access
to a cellular communication system is provided pursuant to purchase of a subscription,
either on a revolving, i.e., monthly basis, or on a pre-paid, time-usage basis. Cellular
communication systems, operable pursuant to different operating standards, define
radio air interfaces at different frequency bands, for instance, at the 800 MHz frequency
band, at the 900 MHz frequency band, and at bands located between 1.7 GHz and 2.2
GHz.
[0005] Other types of radio communication systems are also widely used, for instance, Bluetooth
(tm)-based and IEEE 802.11 b/g -based systems, implemented, e.g., as, WLAN (Wireless
Local Area Network) systems, also provide for voice and data communications, generally
over smaller coverage areas than their cellular counterparts. WLANs are regularly
operated as private networks, providing users who have access to such networks the
capability to communicate therethrough through the use of Bluetooth-capable or 802.11
b/g -capable wireless devices. WLANs are sometimes configured to be connected to public
networks, such as the Internet, and, in turn, to other communication networks, such
as PSTNs (Public Switched Telephonic Networks) and PLMNs (Public Land Mobile Networks).
Interworking entities also are sometimes provided to provide more-direct connection
between the small-area networks and a PLMN. Various of the aforementioned systems
are implemented at the 2.4 GHZ frequency band.
[0006] Radio communication systems are generally bandwidth-constrained. That is to say,
bandwidth allocations for their operation are limited. And, such limited allocation
of bandwidth, imposes limits upon the communication capacity of the communication
system. Significant efforts have been made, and attention directed towards manners
by which, to efficiently utilize the limited bandwidth allocated in bandwidth-constrained
systems. Dual-polarization communication techniques are sometimes utilized. In a dual-polarization
technique, data communicated at the same frequency is communicated in separate, polarized
planes. Close to a doubling of the communication capacity is possible through the
use of dual-polarization techniques. To transduce signal energy pursuant to a dual-polarization
scheme, the wireless device is required to utilize a dual-polarized antenna, operable
in the separate polarization planes. Use of dual-polarization techniques also are
advantageous for the reason that the effects of multi-path transmission and other
interference are generally reduced, thereby improving quality of signal transmission
and reception.
[0007] A dual-polarized antenna is realizable, for instance, by feeding a square patch antenna
at two orthogonal edges thereof by way of an edge feed or a probe feed. Generally,
existing dual-polarized patch antennas are used in conjunction with two feeding-network
circuits. Such existing antennas suffer from various limitations. For instance, separation
distances between the feed connections are required to be great enough to prevent
occurrence of coupling between the respective feeding lines. Excessive amounts of
coupling results in high cross polarization levels.
[0008] There are prior art publications that describe microstrip patch antennas. One such
article is entitled, "
Low cost, dual linearly polarized microstrip patch array" by S.E. Gao et al. and published
in the February 2001 edition of IEE Proceedings on Microwave Antenna Propagation. Another article is entitled
"
A dual-polarized microstrip antenna array with high isolation fed by coplanar network"
by Shichang Gao et al, published in 1998 by the IEEE RAWCON '98 Proceedings. Both of these prior art references teach the use of two-input port antennas.
US Patent Application publication no. 2003122715 (A1) describes a multi-element planar array antenna having a ground conductor formed
on a first principal surface of the substrate, a first and a second slot line formed
in the ground conductor and intersecting each other, a first and a second microstrip
line formed on a second principal surface of the substrate, and traversing the first
slot line respectively at positions corresponding to both end sides of the first slot
line, a third and a fourth microstrip line formed on the second principal surface,
and traversing the second slot line respectively at positions corresponding to both
end sides of the second slot line, and four antenna elements of microstrip line type
formed respectively in intersection regions between both end sides of the first and
second microstrip lines and both end sides of the third and fourth microstrip lines,
respectively, on the second principal surface.
[0009] As wireless devices are of increasingly small dimensions, packaged in housings of
increasingly-smaller dimensions, problems associated with the cross-polarization levels
are likely to become more significant. An improved, dual polarized antenna, constructed
in a manner to reduce such deleterious problems is needed.
[0010] It is in light of this background information related to antennas for radio devices
that the significant improvements of the present invention have evolved.
Brief Description of the Drawings
[0011] Figure 1 illustrates a functional block diagram of a radio communication system in
which an embodiment of the present invention is operable.
[0012] Figure 2 illustrates a plan view of a dual-polarized, microstrip patch antenna of
an embodiment of the present invention.
[0013] Figure 3 illustrates a graphical representation showing simulated and measured return
losses plotted as a function of frequency of an antenna forming part of a wireless
device of an exemplary embodiment of the present invention.
[0014] Figure 4 illustrates a representation of an exemplary, simulated current distribution
of an antenna of an embodiment of the present invention at 2.47 GHz.
[0015] Figure 5 illustrates a graphical representation of simulated radiation patterns of
an antenna of an embodiment of the present invention at 2.47 GHz.
[0016] Figure 6 illustrates a graphical representation, similar to that shown in Figure
5, but of measured radiation patterns exhibited by an antenna of an embodiment of
the present invention at 2.47 GHz.
[0017] Figure 7 illustrates a graphical representation showing simulated gain of an antenna
of an embodiment of the present invention.
[0018] Figure 8 illustrates a method flow diagram representative of the method of operation
of an embodiment of the present invention.
Detailed Description
[0019] The present invention, accordingly, advantageously provides antenna apparatus, and
an associated method, for a portable radio device, such as a Bluetooth-compatible
or 802.11 b/g -compatible device that operates at the IMS (Industry, Medical and Scientific)
frequency band.
[0020] Through operation of an embodiment of the present invention, a dual-polarized antenna
of compact construction is provided. The antenna is capable of positioning at, or
within, a radio housing of the portable radio device.
[0021] The antenna is formed of an array of comer-positioned patches that are disposed upon
the substrate. The comer-positioned patches together with connector strips that interconnect
adjacent patches are symmetrical in both a first polarization direction and a second
polarization direction. And, the conductive material etched, or otherwise disposed,
upon the substrate are symmetrically excitable at a resonant frequency, such as around
2.47 GHz, of the IMS frequency band.
[0022] The corner-positioned patches form an array of patches in which each patch of the
array is of a corresponding geometrical dimension. Each patch is square-shaped. Each
square-shaped patch is of a common lengthwise and widthwise dimension, thereby to
permit the resultant array to be symmetrical in two directions, a first polarization
direction and a second polarization direction in which the second polarization direction
is orthogonal to the first polarization direction. The patches, for instance, are
formed in the corners of a rectangular substrate such that the patches extend to the
edge sides of the substrate.
[0023] Connector strips are disposed upon the substrate to interconnect adjacent ones of
the patches of the array. As the patches are arranged in a two-by-two array, four
connector strips, each connecting together a pair of adjacent strips are utilized.
A connector strip extends in a first polarization direction or a second polarization
direction depending on which pair of patches of the array that the connector strip
interconnects. The connector strips are positioned to provide symmetry through an
access that extends in the same polarization direction in which the connector strip
extends. When positioned to connect adjacent patches of the two-by-two array, two
of the four connector strips extend in the first polarization direction and are symmetrical
about a polarization axis that extends in the first polarization direction. And, a
second pair of the four connector strips extend in a second polarization direction
and are symmetrical about a polarization axis that extends in a second polarization
direction. The connector strips thereby interconnect each adjacent patch of the array
and, in the aggregate, interconnect all of the patches of the array.
[0024] A cross strip is disposed upon the substrate extending transversely between a pair
of transverse-positioned patches of the array of patches. A single feed connection
is provided at a midpoint of the transverse-extending cross strip. The feed connection
provides for symmetrical excitation of the symmetrically-positioned parts of the antenna
disposed upon the substrate. The symmetrical excitation is provided through the use
of the single feed connection. Thereby, problems associated with cross polarization
are reduced. And, a high-gain, high-efficiency, compact, dual-polarized antenna is
thereby provided.
[0025] In these and other aspects, therefore, antenna apparatus, and an associated method,
is provided for a radio device. A substrate is provided. And, a group of side-positioned
patches are disposed in symmetrical arrangement upon the substrate. Connecting strips
are disposed upon the substrate. The connecting strips are configured to connect together
adjacent ones of the side-positioned patches of the group. A cross-strip is disposed
upon the substrate. The cross strip is configured to connect together a pair of transversely-configured
patches of the group of the side-positioned patches. The side-positioned patches provide
for dual-polarization operation.
[0026] In these and other aspects, therefore, antenna apparatus, and an associated methodology
is provided for a radio device. A substrate is provided. And a group of patches is
disposed upon the substrate. The patches are configured to form a two-by-two array.
A group of connecting strips is disposed upon the substrate. The connecting strips
are configured to interconnect adjacent ones of the patches of the array. A transverse
strip is further disposed upon the substrate, interconnecting a pair of transversely-positioned
patches. These connecting strips not only act as feeding lines for the patches but
also operate as in-phase radiation elements in each polarization direction.
[0027] Turning first, therefore, to Figure 1, a radio communication system, shown generally
at 10, provides for communications with a mobile station 12. The mobile station, in
the exemplary implementation, operates pursuant to a Bluetooth standard or IEEE 802.11
b/g standard, operable to send and to receive signals at the 2.4 GHz band. More generally,
the mobile station 12 is representative of any of various wireless devices, and the
radio communication system is representative of any various radio communication systems
operable in conformity with any of various communication standards or permitting of
operation at unregulated frequency bands. Accordingly, while the following description
shall describe exemplary operation of a Bluetooth or IEEE 802.11 b/g -compliant system,
operable at the 2.4 GHz frequency band, it should be understood that the following
description is merely exemplary and that the description of operation of the radio
communication system operable in conformity in another manner is analogous.
[0028] The radio communication system includes a network part, here represented by a network
station 14. The network station comprises, for instance, an access point of a WLAN
or an analogous entity that transceives signals with wireless devices, such as the
mobile station 12. The network station, which here forms an access point, is part
of a local network structure (WLAN) 16 that, in turn, is coupled to an external network,
here a public packet data network (PDN) 18, such as the Internet.
[0029] The operating standard pursuant to which the mobile and network stations are operable
is permitting of, and here provides for, dual-polarized communications at the operational
frequency band of the communication system, here an ISM band that extends between
2.40 and 2.485 GHz.
[0030] The mobile station 12 includes transceiver circuitry, here represented by a receive
(RX) part 26 and a transmit (TX) part 28. The receive and transmit parts are coupled,
such as by way of an antenna coupler or other entity that provides isolation between
the transceiver parts to an antenna 32 of an embodiment of the present invention.
The transceiver circuitry is capable of dual-polarization operation. That is to say,
the transmit and receive parts are capable of generating signals for transmission
in both of the polarization directions and also to operate upon signals communicated
to the mobile station in both of the polarization directions.
[0031] Correspondingly, the antenna 32 forms a dual-polarized antenna, capable of transducing
signal energy of both of the polarization directions. That is to say, signal energy
is detected by the antenna in both of the dual-polarization directions. And, signal
energy generated at the mobile station is transduced into electromagnetic form and
radiated in both of the dual polarization directions. In the exemplary implementation,
the antenna 32 is disposed upon a generally planar substrate, of dimensions permitting
its positioning within a housing 36 of the mobile station.
[0032] Figure 2 illustrates in greater detail the antenna 32 of an embodiment of the present
invention and that forms part of the mobile station 12, shown in Figure 1. The antenna
includes a plurality of patches 44 that are disposed upon a substrate 42. The patches
are etched, painted, or otherwise formed upon the substrate. The patches are formed
on the substrate in a manner that defines a two-by-two array of patches. That is,
the patches are formed into two rows and two columns, each patch defined in a single
row and a single column of the array.
[0033] The patches are of square geometry, i.e., are square-shaped. Each patch 44 is of
a widthwise dimension of and is of a lengthwise dimension of a. The patches are each
formed at the corners of substrate 42, here rectangular shaped. Thereby, edges of
the substrate and of the outer peripheral sides of the patches are co-terminus. Through
the use of the commonly-shaped and commonly-dimensioned patches, and through their
positioning in the even array, the group of patches are symmetrical relative to two
symmetry axes, here axes 46 and 48. The axes 46 and 48 are orthogonal to one another.
And, the axes define mutually-orthogonal polarization directions.
[0034] Connecting strips 52 are also disposed upon the substrate 42. The connecting strips
are also disposed, etched, or otherwise formed upon the substrate. Each connecting
strip 52 is configured to interconnect an adjacent pair of the patches 44. In the
two-by-two array, the patches are each connected to two connecting strips as the connecting
strips connect patches of adjacent pairs of patches defined in each of the directions
46 and 48. The connecting strips, in the exemplary implementation, are rectangular-shaped,
each of a width of w. And, the patches are separated by separation distances d. And,
accordingly, each of the connecting strips is of a length of d. The connecting strips
are also symmetrical about one of the symmetry axes 46 and 48. The resultant structure
formed of the patches 44 and connecting strips 52 are, together, two-way symmetrical
about the axes 46 and 48.
[0035] The antenna 32 further includes a cross strip 56 disposed, etched, or otherwise formed
upon the substrate to extend transversely between a transverse-positioned pair of
the patches 44. A feed connection 58 is defined midway along the length of the cross
strip. The positioning of the feed connection provides for symmetrical excitation,
thereby to reduce cross-polarization levels of dual-polarization components. In the
exemplary implementation, the substrate further includes a common ground plane 60
formed upon a bottom (as-shown) side thereof. The common ground plane defines a reflector
that is separated from the conductive elements that are disposed upon the substrate
and here separated by a distance defined by the thickness of the substrate.
[0036] Figure 3 illustrates a graphical representation 92 illustrating plots 94 and 96 that
are representative of simulated and measured return losses, respectively, plotted
as a function of frequency. In the exemplary implementation, the antenna is resonant
at the 2.4 GHz frequency band, and the plots are indicative thereof.
[0037] Figure 4 again illustrates the antenna 32 of an exemplary embodiment of the present
invention. Here, a simulated current distribution exhibited by the antenna at its
resonant frequency of 2.47 GHz. The antenna headers represent the current in the antenna.
Analysis of the current distribution indicates that the current distribution includes
components extending in directions parallel to the polarization axes 46 and 48 shown
in Figure 2.
[0038] Figures 5 and 6 illustrate, respectively, simulated and measured, two-dimensional,
radiation patterns of the antenna 32 of an embodiment of the present invention at
its 2.47 GHz resonant frequency. In each representation, both zero and ninety degree-plane
representations 102 and 104 are plotted.
[0039] Figure 7 illustrates a graphical representation 106 illustrating simulated gain,
as a function of frequency, exhibited by the antenna 32 of an embodiment of the present
invention. The gain is centered at, or close to, the 2.47 GHz resonant frequency.
[0040] Figure 8 illustrates a method flow diagram, shown generally at 112, representative
of the method of operation of an embodiment of the present invention. The method is
for transducing signal energy at a radio device.
[0041] First, and as indicated by the block 114, a group of patches are disposed upon a
substrate. The patches are configured to form a two-by-two array. And, as indicated
by the block 116, a group of connecting strips are disposed upon the substrate. The
strips of the connecting strips are configured to interconnect adjacent ones of the
patches.
[0042] Once formed on the substrate, the patches are used to transduce signal energy, polarized
in the polarization direction and in the second polarization direction, at the first
and second groups, respectively, of the loop strips.
[0043] Thereby, a dual-polarized antenna, of compact dimensions is provided. Through the
use of patches disposed upon a substrate, configured in a manner to permit use of
a single feed connection to symmetrically excite the antenna, so-configured, obviates
the problems associated with multiple feed connections used by conventional dual-polarized
antennas are obviated.
1. A dual polarized antenna apparatus (32) for a radio device (12), said antenna apparatus
(32) comprising:
a planar, rectangular substrate (42);
four square-shaped patches (44) disposed in symmetrical arrangement upon a first side
of said planar, rectangular substrate (42), one patch being formed at each corner
of the planar rectangular substrate;
four connecting strips (52) disposed upon the first side of said planar rectangular
substrate (42), each connecting strip connecting together only the patches (44) in
adjacent corners of the planar rectangular substrate (42), and
a cross strip (56) disposed upon the first side of said substrate (42), said cross
strip (56) extending between and connecting together the patches formed at a first
pair of diagonally-opposite corners of the rectangular substrate, the cross strip
having and providing to the antenna apparatus (32) a single feed point connection
(58) located at a mid point of the cross strip (56) to provide for symmetrical excitation;
and
a ground plane (60) on the second side of the substrate (42), the ground plane (60)
defining a reflector that is separated from the patches (44), connecting strips (52)
and cross strip (56) on the first side of the substrate (42) by a distance defined
by the thickness of the substrate (42).
2. The apparatus (32) of claim 1 wherein the patches (44) disposed upon said substrate
(42) in said symmetrical arrangement are symmetrical in both a first polarization
direction and in a second polarization direction.
3. The apparatus (32) of claim 1 wherein each connecting strip of said connecting strips
(52) is configured to be of a first selected length and of a first selected width.
4. The apparatus (32) of claim 1 wherein the group of the patches (44) is configured
to be resonant in both a first polarization direction and a second polarization direction
at a 2.4 GHz frequency band.
5. A method (112) for transducing signal energy at a radio device (12), said method comprising
the operations of:
disposing (114) four square-shaped patches (44) in a symmetrical arrangement upon
a first surface of a planar, rectangular substrate (42), one patch (44) being formed
at each corner of the substrate (42);
disposing (116) four connecting strips (52) upon the first side of the substrate (42),
each connecting strip connecting together only patches (44) in adjacent corners of
the rectangular substrate (42);
disposing (116) a cross-strip (56) upon the first side of the substrate (42), the
cross-strip being configured to provide a single feed point connection (58) to the
antenna apparatus (32) and the cross-strip (56) extending between and connecting together
the patches formed at a first pair of diagonally-opposite corners of the rectangular
substrate, the cross strip (56) having and providing to the antenna apparatus (32),
a single feed point (58) located at a midpoint of the cross strip (56) to provide
for symmetrical excitation;
disposing a ground plane (60) on the second side of the substrate (42), the ground
plane (60) defining a reflector that is separated from the patches (44), connecting
strips (52) and cross strip (56) on the first side of the substrate (42) by a distance
defined by the thickness of the substrate (42); and
transducing (118) signal energy, polarized in a first polarization direction and in
a second polarization direction at the patches of the group of patches (44).
6. The method of claim 5 further comprising the operation of connecting a radio device
(12) to said single feed point (58) of the cross-strip (56).
7. The method of claim 6 further comprising the operation of symmetrically exciting the
patches, (44) the connecting strips (52), and the cross-strip disposed during said
operations of disposing with signal energy.
8. The method of claim 7 wherein the signal energy provided during said operation of
symmetrical exciting comprises signal energy of 2.4 GHz.
9. The method of claim 5 wherein the group of the patches (44) disposed during said operation
of disposing the group of the patches (44) comprises the patches in a first symmetrical
arrangement in a first polarization direction and in a second symmetrical arrangement
in a second polarization direction.
1. Dual-polarisierte Antennenvorrichtung (32) für eine Funkvorrichtung (12), wobei die
Antennenvorrichtung (32) aufweist:
ein planares rechteckiges Substrat (42);
vier quadratisch-geformte Patches (44), die in einer symmetrischen Anordnung auf einer
ersten Seite des planaren rechteckigen Substrats (42) angeordnet sind, wobei ein Patch
an jedem Eck des planaren rechteckigen Substrats ausgebildet ist;
vier Verbindungsstreifen (52), die auf der ersten Seite des planaren rechteckigen
Substrats (42) angeordnet sind, wobei jeder Verbindungsstreifen nur die Patches (44)
in angrenzenden Ecken des planaren rechteckigen Substrats (42) miteinander verbindet;
und
einen Querstreifen (56), der auf der ersten Seite des Substrats (42) angeordnet ist,
wobei sich der Querstreifen (56) zwischen den Patches erstreckt und die Patches miteinander
verbindet, die an einem ersten Paar von diagonal entgegengesetzten Ecken des rechteckigen
Substrats ausgebildet sind, wobei der Querstreifen hat und für die Antennenvorrichtung
(32) vorsieht eine einzelne Zufuhrpunktverbindung (58), die sich an einem Mittelpunkt
des Querstreifens (58) befindet, um eine symmetrische Erregung vorzusehen; und
eine Groundplane (60) auf der zweiten Seite des Substrats (42), wobei die Groundplane
(60) einen Reflektor definiert, der von den Patches (44), Verbindungsstreifen (52)
und dem Querstreifen (56) auf der ersten Seite des Substrats (42) getrennt ist um
einen Abstand, der durch die Dicke des Substrats (42) definiert ist.
2. Vorrichtung (32) gemäß Anspruch 1, wobei die Patches (44), die auf dem Substrat (42)
in einer symmetrischen Anordnung angeordnet sind, symmetrisch sind in sowohl eine
erste Polarisationsrichtung als auch in eine zweite Polarisationsrichtung.
3. Vorrichtung (32) gemäß Anspruch 1, wobei jeder Verbindungsstreifen der Verbindungsstreifen
(52) konfiguriert ist, eine erste ausgewählte Länge und eine erste ausgewählte Breite
zu haben.
4. Vorrichtung (32) gemäß Anspruch 1, wobei die Gruppe der Patches (44) konfiguriert
ist, in sowohl eine erste Polarisationsrichtung als auch in eine zweite Polarisationsrichtung
resonant zu sein bei einem 2,4 GHz-Frequenzband.
5. Verfahren (112) zum Transduzieren von Signalenergie an einer Funkvorrichtung (12),
wobei das Verfahren die Operationen aufweist:
Anordnen (114) von vier quadratisch-geformten Patches (44) in einer symmetrischen
Anordnung auf einer ersten Oberfläche eines planaren rechteckigen Substrats (42),
wobei ein Patch (44) an jedem Eck des Substrats (42) ausgebildet ist;
Anordnen (116) von vier Verbindungsstreifen (52) auf der ersten Seite des Substrats
(42), wobei jeder Verbindungsstreifen nur Patches (44) in angrenzenden Ecken des rechteckigen
Substrats (42) miteinander verbindet; Anordnen (116) eines Querstreifens (56) auf
der ersten Seite des Substrats (42), wobei der Querstreifen konfiguriert ist, eine
einzelne Zufuhrpunktverbindung (58) zu der Antennenvorrichtung (32) vorzusehen, und
sich der Querstreifen (56) zwischen den Patches erstreckt und diese miteinander verbindet,
die an einem ersten Paar von diagonal entgegengesetzten Ecken des rechteckigen Substrats
ausgebildet sind, wobei der Querstreifen (56) hat und für die Antennenvorrichtung
(32) vorsieht eine einzelne Zufuhrpunktverbindung (58), die sich an einem Mittelpunkt
des Querstreifens (58) befindet, um eine symmetrische Erregung vorzusehen;
Anordnen einer Groundplane (60) auf der zweiten Seite des Substrats (42), wobei die
Groundplane (60) einen Reflektor definiert, der von den Patches (44), Verbindungsstreifen
(52) und dem Querstreifen (56) auf der ersten Seite des Substrats (42) getrennt ist
um einen Abstand, der durch die Dicke des Substrats (42) definiert ist; und
Transduzieren (118) von Signalenergie, die in eine erste Polarisationsrichtung und
in eine zweite Polarisationsrichtung polarisiert ist an den Patches der Gruppe von
Patches (44).
6. Verfahren gemäß Anspruch 5, das weiter aufweist die Operation eines Verbindens einer
Funkvorrichtung (12) mit dem einzelnen Zufuhrpunkt (58) des Querstreifens (56).
7. Verfahren gemäß Anspruch 6, das weiter aufweist die Operation eines symmetrischen
Erregens der Patches (44), der Verbindungsstreifen (52) und des Querstreifens, die
während der Operationen des Anordnens angeordnet werden, mit Signalenergie.
8. Verfahren gemäß Anspruch 7, wobei die Signalenergie, die während der Operation eines
symmetrischen Erregens vorgesehen ist, eine Signalenergie mit 2,4 GHz aufweist.
9. Verfahren gemäß Anspruch 5, wobei die Gruppe von Patches (44), die während der Operation
des Anordnens der Gruppe von Patches (44) angeordnet wird, die Patches in einer ersten
symmetrischen Anordnung in eine erste Polarisationsrichtung und in eine zweite symmetrische
Anordnung in eine zweite Polarisationsrichtung aufweist.
1. Dispositif. (32) d'antenne doublement polarisée pour un appareil radio (12), ledit
dispositif (32) d'antenne comprenant :
un substrat rectangulaire plan (42) ;
quatre pièces (44) de forme carrée disposées en un agencement symétrique sur un premier
côté dudit substrat rectangulaire plan (42), une pièce étant formée à chaque coin
du substrat rectangulaire plan ;
quatre bandes (52) de liaison disposées sur le premier côté dudit substrat rectangulaire
plan (42), chaque bande de liaison reliant ensemble seulement les pièces (44) dans
des coins adjacents du substrat rectangulaire plan (42) ; et
une bande transversale (56) disposée sur le premier côté dudit substrat (42), ladite
bande transversale (56) s'étendant entre et reliant ensemble les pièces formées au
niveau d'une première paire de coins opposés en diagonale du substrat rectangulaire,
la bande transversale comportant et fournissant au dispositif (32) d'antenne une connexion
en un unique point (58) d'alimentation situé au point milieu de la bande transversale
(56) pour procurer une excitation symétrique ; et
un plan (60) de masse sur le second côté du substrat (42), le plan (60) de masse définissant
un réflecteur qui est séparé des pièces (44), des bandes (52) de liaison et de la
bande transversale (56) sur le premier côté du substrat (42) par une distance définie
par l'épaisseur du substrat (42).
2. Dispositif (32) selon la revendication 1, dans lequel les pièces (44) disposées sur
ledit substrat (42) dans ledit agencement symétrique sont symétriques à la fois dans
une première direction de polarisation et dans une seconde direction de polarisation.
3. Dispositif (32) selon la revendication 1, dans lequel chaque bande de liaison desdites
bandes (52) de liaison est constituée de façon à être d'une première longueur choisie
et d'une première largeur choisie.
4. Dispositif (32) selon la revendication 1 dans lequel le groupe des pièces (44) est
constitué de façon à être résonnant à la fois dans une première direction de polarisation
et une seconde direction de polarisation à une bande de fréquences de 2,4 GHz.
5. Procédé (112) de transduction d'énergie de signal au niveau d'un l'appareil radio
(12), ledit procédé comprenant les opérations :
de disposition (114) de quatre pièces (44) de forme carrée en un agencement symétrique
sur une première face d'un substrat rectangulaire plan (42), une pièce (44) étant
formée à chaque coin du substrat (42) ;
de disposition (116) de quatre bandes (52) de liaison sur le premier côté du substrat
(42), chaque bande de liaison reliant ensemble seulement des pièces (44) dans des
coins adjacents du substrat rectangulaire (42) ; et
de disposition (116) d'une bande transversale (56) sur le premier côté du substrat
(42), la bande transversale étant constituée pour fournir au dispositif (32) d'antenne
une connexion en un unique point d'alimentation (58) et la bande transversale (56)
s'étendant entre et reliant ensemble les pièces formées au niveau d'une première paire
de coins opposés en diagonale du substrat rectangulaire, la bande transversale (56)
comportant et fournissant au dispositif (32) d'antenne une connexion en un unique
point d'alimentation (58) situé au point milieu de la bande transversale (56) pour
procurer une excitation symétrique ;
de disposition d'un plan (60) de masse sur le second côté du substrat (42), le plan
(60) de masse définissant un réflecteur qui est séparé des pièces (44), des bandes
(52) de liaison et de la bande transversale (56) sur le premier côté du substrat (42)
par une distance définie par l'épaisseur du substrat (42) ; et
de transduction (118) d'énergie de signal, polarisée dans une première direction de
polarisation et dans une seconde direction de polarisation au niveau des pièces du
groupe de pièces (44).
6. Procédé selon la revendication 5, comprenant en outre l'opération de connexion d'un
appareil radio (12) audit unique point (58) d'alimentation de la bande transversale
(56).
7. Procédé selon la revendication 6, comprenant en outre l'opération d'excitation de
manière symétrique, avec de l'énergie de signal, des pièces (44), des bandes (52)
de liaison et de la bande transversale, disposées aux cours desdites opérations de
disposition.
8. Procédé selon la revendication 7, dans lequel l'énergie de signal fournie pendant
ladite opération d'excitation symétrique comprend de l'énergie de signal de 2,4 GHz.
9. Procédé selon la revendication 5, dans lequel le groupe des pièces (44) disposées
au cours de ladite opération de disposition du groupe des pièces (44) comprend les
pièces dans un premier agencement symétrique dans une première direction de polarisation
et dans un second agencement symétrique dans une seconde direction de polarisation.